fix: incorrect $0 and $@ parameters in shell command under empty directories

yazi-core/src/tab/tab.rs

@@ -1,5 +1,3 @@
-use std::iter;
-
 use anyhow::Result;
 use ratatui::layout::Rect;
 use tokio::task::JoinHandle;
@@ -96,7 +94,9 @@ impl Tab {
 	}
 
 	pub fn hovered_and_selected(&self) -> Box<dyn Iterator<Item = &UrlBuf> + '_> {
-		let Some(h) = self.hovered() else { return Box::new(iter::empty()) };
+		let Some(h) = self.hovered() else {
+			return Box::new([UrlBuf::new()].into_iter().chain(self.selected.values()));
+		};
 		if self.selected.is_empty() {
 			Box::new([&h.url, &h.url].into_iter())
 		} else {

yazi-shared/src/loc/buf.rs

@@ -84,6 +84,8 @@ impl LocBuf {
 		Ok(Self { inner: loc.inner, uri, urn })
 	}
 
+	pub const fn empty() -> Self { Self { inner: PathBuf::new(), uri: 0, urn: 0 } }
+
 	pub fn zeroed(path: impl Into<PathBuf>) -> Self {
 		let loc = Self::from(path.into());
 		let Loc { inner, uri, urn } = Loc::zeroed(&loc.inner);

yazi-shared/src/url/buf.rs

@@ -79,6 +79,12 @@ impl PartialEq<Url<'_>> for &UrlBuf {
 }
 
 impl UrlBuf {
+	#[inline]
+	pub const fn new() -> &'static Self {
+		static U: UrlBuf = UrlBuf { loc: LocBuf::empty(), scheme: Scheme::Regular };
+		&U
+	}
+
 	#[inline]
 	pub fn join(&self, path: impl AsRef<Path>) -> Self { self.as_url().join(path) }